While the app was initially approved a further review of it found it to be against guidelines.

Steam Database reported Valve as stating Apple had “revoked its approval citing business conflicts with app guidelines that had allegedly not been realised by the original review team”.

Apple’s updated guidelines prohibit apps that “provide a store-like interface, or include the ability to browse, select, or purchase software not already owned or licensed by the users”.

Under that specific guideline the older version of the iOS Steam Link would be seen as breaking the rules. This is because the Steam Link app allows users access to a mirror version of Steam running on a remote PC.

By comparison, Facebook is also facing challenges with Facebook Instant Games on the App Store.

The social networking giant recently introduced in-app purchases, and while available on the Facebook website and Google Play, IAPs have yet to be implemented on Instant Games through the iOS Facebook Messenger app.

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